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Single Layer Edge Detection Pattern

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Related People

Danny Deng: INVENTOR

Abstract

Finger touch on sensor edge, or on the bezel or side of a device, is an emerging area of interest. Several applications based on edge swipe and edge tap may be utilized for upcoming products. It may become a must have feature in smart phone design, especially in GFF sensor. Single layer sensor cost much less than a typical GFF sensor.
In this single layer edge touch sensor, 2 electrodes are placed near left and right boards of touch sensor, acting as receivers. One electrode of transmitter is placed next to receiver electrodes. To drive the transmitter electrode in various ways, these 2 receive electrodes acquired 4 sets of data. Finger touch positions could be calculated on these data. This is a gradient sensor application in single layer board detection.

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Page 01 of 3

Single Layer Edge Detection Pattern

1. Inventor(s): Danny Deng

2. Synaptics Incorporated, San Jose, CA, USA

3. Short Summary

Finger touch on sensor edge, or on the bezel or side of a device, is an emerging area of interest. Several applications based on edge swipe and edge tap may be utilized for upcoming products. It may become a must have feature in smart phone design, especially in GFF sensor. Single layer sensor cost much less than a typical GFF sensor.

In this single layer edge touch sensor, 2 electrodes are placed near left and right boards of touch sensor, acting as receivers. One electrode of transmitter is placed next to receiver electrodes. To drive the transmitter electrode in various ways, these 2 receive electrodes acquired 4 sets of data. Finger touch positions could be calculated on these data. This is a gradient sensor application in single layer board detection.

4. Some Problems Solved

Examples of some of the problems addressed by the invention include:

Edge detection is a new feature in the capacitive sensing market. It is complicated to implement it in 2 layer touch sensor. This solution addresses a way to implement edge touch sensing in single layer sensor.

5. General Description

Finger response on a pair of electrode strip can vary linearly on distance when exciting signal is enabled at one end.

Page: 1 of 3 Information contained in this publication is provided as-is, with no express or implied warranties, including any warranty of merchantability, fitness for any particular purpose, or non-infringement. Synaptics Incorporated assumes no liability whatsoever for any use of the information contained herein, including any liability for intellectual property infringement. This publication conveys no express or implied licenses to any intellectual property rights belonging to Synaptics or any other party. Synaptics may, from time to time and at its sole option, update the information contained herein without notice.

Danny Deng

Single Layer Edge Detection Pattern

Page 02 of 3

Single Layer Edge Detection Pattern

2D Area

Transmitter electrode is an ITO trace around sensor. Both ends are connected to separate TX pins of touch controller.